[Adonthell-devel] Composite map objects

[Kai Sterker]

Splitting that into its own topic, as it's a separate issue.

> The second issue is the shadow when going down the stairs. It appears
> the shadow position is based on an object's global bounding box, not
> the fine grained shape used for collision detection. Since the
> staircase is a single object (unlike the one in the old test map,
> which is one object per stair). So here we have two solutions:
>
> Improve rendering of the shadow (although I fear this isn't a small
> task) or updating the staircase object, so that each stair is an
> individual sprite.

Tried this out today and created my first composite object, i.e. a map
object consisting of multiple sprites/models.
(see models/map/ground/inside/wood-stairs2.xml)

Everything looked fine in modeller, but (a) it is not correctly
rendered in mapedit, which seems to suggest that it's overall bounding
box has the wrong proportions. It does appear on the map, although it
faces the same problems as in mapedit, plus collision detection for it
is broken. Again, issue might be the same, as I believe the overall
bbox is what is checked for overlap first before the detailed
collision detection kicks in.

I've already fixed a problem with loading composite objects (only
every second part was loaded), but I won't be able to look at the bbox
thing tonight. I assume the issue is to be found in
placeable::add_model and/or placeable::set_state. Hopefully, fixing
the bounding box will automatically solve any rendering and collsiion
issues too.

One piece of information, as placeable might look confusing at first.
There are basically 4 bounding boxes, each one specified by their
position and size:

'Cur' and 'Max', each in the flavour 'Entire' and 'Solid'.

The 'Max' variant includes the extension of all possible states an
object can have. It is used for keeping the object on the map as this
value will never change, so we never have to update the map structure
either.
The 'Cur' variant is the extension of the objects actual state, used
for rendering, pathfinding and collision detection.
The 'Solid' variant includes only parts of the object that are marked
as solid. It's used for pathfinding and collision detection (as
non-solid parts of objects don't have to be considered for those).
The 'Entire' variant finally includes the non-solid bits too. Used for
rendering and keeping stuff on the map.

(A bit messy, I admit. Not sure if there'd be a nice way to clean this
up a little).


So feel free to have a look at this issue. Just let me know if you do,
so that I won't accidently duplicate the effort. Won't look at stuff
before tomorrow evening.

Kai